Why don't scientist take up the study of
Very easily answered because none can explain them,there is no proof they exist.
Well that was about the easiest answer i have ever been asked about to explain on this forum
Honestly i believe that spirits can exist energy never dies,but what one puts as a good or bad possible spirit that they have no proof even exist is pure foolishness.
There question answered.If you want a expert opinion to tell you the same thing ask a scientist why they do not study things that have no factual basis to them or why people label one good or bad.A scientist i am not,if you do not believe in science i have plenty of good ideas i can prove if you want to send me a bit of cash to fund my projects